IPA: /ˈbæn.deɪd/
KK: /ˈbænˌdeɪd/
A small adhesive bandage used to cover minor cuts or injuries.
She put a bandaid on her scraped knee after falling off her bike.
The word 'bandaid' is a compound of 'band' (from Old English 'banda', meaning a strip or bandage) and 'aid' (from Old French 'aider', meaning to help). Together, 'bandaid' refers to a strip that helps to cover and protect a wound.
Think of a 'band' that 'helps' — that's what a bandaid does; it covers and aids a wound.